JVC VR601 instruction manual PRE- Alarm

REC QUALITY:

This option determines the image quality to be recorded when an alarm input occurs. There are 4 levels of image quality to choose from: BEST, HIGH, STANDARD, and BASIC. The table below shows the level of image quality with the corresponding compression ratio and image size.

Image Quality		Compression Ratio
	Best	High	Standard	Basic
Image Size	48KB	32KB	21KB	16KB

AUDIO:

This option determines the way to record sound if necessary.

ON: Enables AUDIO recording.

OFF: Disables AUDIO recording.

NOTE: Audio function can only be activated in the following refresh rate in NTSC(PAL): 12(10), 5.5(5.5), 2.4(2.9), 1.22(1.52), 0.71(0.88) fields/sec

ALM TYPE:

This option allows users to set a type of alarm input corresponding to the sensor signal in use.

NO: Normally Open. This is to be used with the type of alarm sensor whose contact remains open in normal conditions and closes in case of activation.

NC: Normally Closed. This is to be used with the type of alarm sensor whose contact remains closed in normal conditions and opens in case of activation.

ALM DURATION:

This option allows users to set alarms for a certain duration. You can select one of the six following options: 0 SEC, 30SEC, 1 MIN, 5 MIN, 10 MIN, and NON-STOP.

D uration Set ting

		Alarm recording
			Duration
Alarm		Alarm
activated		deactivated
Non-Stop		Alarm recording
			Duration
Alar	m	Alar m		Reset
activated		deactivated

NOTE: Recording may be interrupted at the time of Alarm-in or Alarm-out. LIVE images may be interrupted at the time of Alarm-out.

PRE- ALARM:

This option determines that images prior to an alarm occurs will be recorded in the hard-disk drive. When an alarm is triggered the device will record the image prior to the alarm for 5 seconds in NTSC (**20 fields/sec) or 6 seconds in PAL (**17 fields/sec).

ON: Enables this function.

OFF: Disables this function.

NOTE: If the device is already under recording mode before alarm occur, the pre-alarm recording would not take effect.

**: For NTSC and Mux Off Mode, recording rate 20F/S would be actually 15 F/S For PAL and Mux Off Mode, recording rate 17F/S would be actually 12.5 F/S.

( This adjustment is to avoid image shaking during playback at the same speed )

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